(CBS NEWS) – “Big Brother” is bringing two new twists when it returns next week for its 15th season. For the first time, CBS has announced, three houseguests will be up for eviction each week instead of the usual two. This process will be further explained during the season premiere.

The second twist allows viewers to cast votes for the houseguest they believe is playing the best game. The one that receives the most votes will be named that week’s “Big Brother MVP.”

Fans can start casting their votes before the season even starts — beginning with a pre-premiere vote this Thursday following the network’s announcement of the houseguests. (To vote, go to the “Big Brother” website.)

“The Big Brother MVP will force the houseguests to rethink their strategies. With America rewarding good game play, it doesn’t pay to be a floater this summer,” executive producers Allison Grodner and Rich Meehan said.

When the show returns, contestants will be living (and being watched) in a new house, outfitted with a stone fireplace, redesigned kitchen and a Head of Household suite decked out entirely in black and white.

“We’re calling it mid-century chic,” host Julie Chen said. “Picture the ’60s, ‘Mad Men,’ Pan Am, that whole era — what was happening in the ’60s and how the people in the ’60s envisioned the future.”

Watch the video above to see Chen give a tour of the house.

“Big Brother” returns to KPIX 5 / CBS on June 26 at 8 p.m. ET.

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